Food for thought.
Coffee shops, family restaurants, and bars are nice places to meet with friends. The biggest drawback, however, is that they are quite expensive by U.S. standards. However, if you order the teishoku定食sets it is often quite reasonable. If you are on a budget look out for all-you-can-eat tabehoudai食べ放題 and all-you-can-drink nomihoudai 飲み放題 offers that are plentiful. Convenience stores such as 7-11, Family Mart, Lawson, and others provide cheap, and often quite good options for meals at home or on the go. You can get onigiri (rice balls), noodles, salads, and many teishokutype options.